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Water chemistry in 179 randomly selected Swedish headwaterstreams related to forest production, clear-felling and climate [Elektronisk resurs]

Löfgren, Stefan (författare)
Fröberg, Mats (författare)
Yu, Jun 1962- (författare)
Nisell, Jakob (författare)
Ranneby, Bo (författare)
Umeå universitet Teknisk-naturvetenskapliga fakulteten (utgivare)
Mathematical Statistics ; Arcum (medarbetare)
Springer Berlin/Heidelberg 2014
Engelska.
Ingår i: Environmental Monitoring & Assessment. - 0167-6369. ; 1-22
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  • From a policy perspective, it is important to understand forestry effects on surface waters from a landscape perspective. The EU Water Framework Directive demands remedial actions if not achieving good ecological status. In Sweden, 44 % of the surface water bodies have moderate ecological status or worse. Many of these drain catchments with a mosaic of managed forests. It is important for the forestry sector and water authorities to be able to identify where, in the forested landscape, special precautions are necessary. The aim of this study was to quantify the relations between forestry parameters and headwater stream concentrations of nutrients, organic matter and acid-base chemistry. The results are put into the context of regional climate, sulphur and nitrogen deposition, as well as marine influences. Water chemistry was measured in 179 randomly selected headwater streams from two regions in southwest and central Sweden, corresponding to 10 % of the Swedish land area. Forest status was determined from satellite images and Swedish National Forest Inventory data using the probabilistic classifier method, which was used to model stream water chemistry with Bayesian model averaging. The results indicate that concentrations of e.g. nitrogen, phosphorus and organic matter are related to factors associated with forest production but that it is not forestry per se that causes the excess losses. Instead, factors simultaneously affecting forest production and stream water chemistry, such as climate, extensive soil pools and nitrogen deposition, are the most likely candidates The relationships with clear-felled and wetland areas are likely to be direct effects. 

Ämnesord

Natural Sciences  (hsv)
Earth and Related Environmental Sciences  (hsv)
Oceanography, Hydrology, Water Resources  (hsv)
Naturvetenskap  (hsv)
Geovetenskap och miljövetenskap  (hsv)
Oceanografi, hydrologi, vattenresurser  (hsv)
Mathematics  (hsv)
Probability Theory and Statistics  (hsv)
Matematik  (hsv)
Sannolikhetsteori och statistik  (hsv)
Climate Research  (hsv)
Klimatforskning  (hsv)
Agricultural Sciences  (hsv)
Agricultural Science, Forestry and Fisheries  (hsv)
Forest Science  (hsv)
Lantbruksvetenskaper  (hsv)
Lantbruksvetenskap, skogsbruk och fiske  (hsv)
Skogsvetenskap  (hsv)

Indexterm och SAB-rubrik

water chemistry
headwater streams
boreal landscape
forestry
representative sampling
probabilistic classifying
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